1 /**
2 * This file Copyright (c) 2019 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.ui.field;
35
36
37 import info.magnolia.objectfactory.ComponentProvider;
38 import info.magnolia.ui.editor.MultiItemConverter;
39
40 import java.util.Collections;
41 import java.util.Optional;
42
43 import com.vaadin.data.Binder;
44 import com.vaadin.data.Converter;
45 import com.vaadin.data.HasValue;
46 import com.vaadin.ui.MultiSelect;
47
48 /**
49 * Select field specific binder. Will automatically apply {@link MultiItemConverter} the field
50 * is multi-select.
51 *
52 * @param <T>
53 * value typAppDescriptorRegistryTestAppDescriptorRegistryTeste
54 */
55 public class SelectFieldBinder<T> extends FieldBinder.Default<T> {
56
57 private final SelectFieldSupport<T> selectFieldSupport;
58
59 public SelectFieldBinder(ComponentProvider componentProvider, SelectFieldSupport<T> selectFieldSupport) {
60 super(componentProvider);
61 this.selectFieldSupport = selectFieldSupport;
62 }
63
64 @Override
65 public <BT> Binder.BindingBuilder<BT, T> configureBinding(FieldDefinition<T> definition, Binder.BindingBuilder<BT, T> source) {
66 if (source.getField() instanceof MultiSelect) {
67 source = source.withNullRepresentation((T) Collections.emptySet());
68 }
69 return super.configureBinding(definition, source);
70 }
71
72 @Override
73 protected <PT> Optional<Converter<PT, ?>> createConfiguredConverter(FieldDefinition<PT> definition, HasValue<?> field) {
74 return Optional.ofNullable(super.createConfiguredConverter(definition, field).orElse((Converter) this.selectFieldSupport.defaultConverter()))
75 .map(converter -> {
76 if (field instanceof MultiSelect) {
77 return new MultiItemConverter((Converter) converter);
78 }
79 return converter;
80 });
81 }
82 }